A numerical approach to stochastic inflation and primordial black holes

30 Aug 2021, 17:10
Talk in parallel session Cosmology and particle physics Discussion Panel Cosmology 1


Eemeli Tomberg (NICPB, Tallinn)


Quantum fluctuations created during cosmic inflation act as seeds of all structure in the universe. The strongest fluctuations lead to the formation of primordial black holes, a dark matter candidate. I present a study where these fluctuations are analyzed numerically within the framework of stochastic inflation. This method allows us to probe nonperturbative effects and include backreaction between the fluctuations and the local background. The results reveal a non-Gaussian, exponential tail in the probability distribution of the fluctuations, enhancing black hole production by a factor of $10^5$ compared to a Gaussian estimate in our CMB-compatible example scenario. The same method may be used to improve the primordial black hole predictions of any inflationary model.

Reference to paper (DOI or arXiv) 2012.06551

Primary author

Eemeli Tomberg (NICPB, Tallinn)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now